| /************************************************************************** |
| * |
| * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR |
| * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| **************************************************************************/ |
| |
| /** |
| * AA line stage: AA lines are converted to texture mapped triangles. |
| * |
| * Authors: Brian Paul |
| */ |
| |
| |
| #include "pipe/p_context.h" |
| #include "pipe/p_defines.h" |
| #include "pipe/p_shader_tokens.h" |
| #include "util/u_inlines.h" |
| |
| #include "util/u_format.h" |
| #include "util/u_math.h" |
| #include "util/u_memory.h" |
| #include "util/u_sampler.h" |
| |
| #include "tgsi/tgsi_transform.h" |
| #include "tgsi/tgsi_dump.h" |
| |
| #include "draw_context.h" |
| #include "draw_private.h" |
| #include "draw_pipe.h" |
| |
| |
| /** Approx number of new tokens for instructions in aa_transform_inst() */ |
| #define NUM_NEW_TOKENS 50 |
| |
| |
| /** |
| * Size for the alpha texture used for antialiasing |
| */ |
| #define TEXTURE_SIZE_LOG2 5 /* 32 x 32 */ |
| |
| /** |
| * Max texture level for the alpha texture used for antialiasing |
| * |
| * Don't use the 1x1 and 2x2 mipmap levels. |
| */ |
| #define MAX_TEXTURE_LEVEL (TEXTURE_SIZE_LOG2 - 2) |
| |
| |
| /** |
| * Subclass of pipe_shader_state to carry extra fragment shader info. |
| */ |
| struct aaline_fragment_shader |
| { |
| struct pipe_shader_state state; |
| void *driver_fs; |
| void *aaline_fs; |
| uint sampler_unit; |
| int generic_attrib; /**< texcoord/generic used for texture */ |
| }; |
| |
| |
| /** |
| * Subclass of draw_stage |
| */ |
| struct aaline_stage |
| { |
| struct draw_stage stage; |
| |
| float half_line_width; |
| |
| /** For AA lines, this is the vertex attrib slot for the new texcoords */ |
| uint tex_slot; |
| /** position, not necessarily output zero */ |
| uint pos_slot; |
| |
| void *sampler_cso; |
| struct pipe_resource *texture; |
| struct pipe_sampler_view *sampler_view; |
| uint num_samplers; |
| uint num_sampler_views; |
| |
| |
| /* |
| * Currently bound state |
| */ |
| struct aaline_fragment_shader *fs; |
| struct { |
| void *sampler[PIPE_MAX_SAMPLERS]; |
| struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; |
| } state; |
| |
| /* |
| * Driver interface/override functions |
| */ |
| void * (*driver_create_fs_state)(struct pipe_context *, |
| const struct pipe_shader_state *); |
| void (*driver_bind_fs_state)(struct pipe_context *, void *); |
| void (*driver_delete_fs_state)(struct pipe_context *, void *); |
| |
| void (*driver_bind_sampler_states)(struct pipe_context *, unsigned, |
| void **); |
| |
| void (*driver_set_sampler_views)(struct pipe_context *, |
| unsigned, |
| struct pipe_sampler_view **); |
| }; |
| |
| |
| |
| /** |
| * Subclass of tgsi_transform_context, used for transforming the |
| * user's fragment shader to add the special AA instructions. |
| */ |
| struct aa_transform_context { |
| struct tgsi_transform_context base; |
| uint tempsUsed; /**< bitmask */ |
| int colorOutput; /**< which output is the primary color */ |
| uint samplersUsed; /**< bitfield of samplers used */ |
| int freeSampler; /** an available sampler for the pstipple */ |
| int maxInput, maxGeneric; /**< max input index found */ |
| int colorTemp, texTemp; /**< temp registers */ |
| boolean firstInstruction; |
| }; |
| |
| |
| /** |
| * TGSI declaration transform callback. |
| * Look for a free sampler, a free input attrib, and two free temp regs. |
| */ |
| static void |
| aa_transform_decl(struct tgsi_transform_context *ctx, |
| struct tgsi_full_declaration *decl) |
| { |
| struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; |
| |
| if (decl->Declaration.File == TGSI_FILE_OUTPUT && |
| decl->Semantic.Name == TGSI_SEMANTIC_COLOR && |
| decl->Semantic.Index == 0) { |
| aactx->colorOutput = decl->Range.First; |
| } |
| else if (decl->Declaration.File == TGSI_FILE_SAMPLER) { |
| uint i; |
| for (i = decl->Range.First; |
| i <= decl->Range.Last; i++) { |
| aactx->samplersUsed |= 1 << i; |
| } |
| } |
| else if (decl->Declaration.File == TGSI_FILE_INPUT) { |
| if ((int) decl->Range.Last > aactx->maxInput) |
| aactx->maxInput = decl->Range.Last; |
| if (decl->Semantic.Name == TGSI_SEMANTIC_GENERIC && |
| (int) decl->Semantic.Index > aactx->maxGeneric) { |
| aactx->maxGeneric = decl->Semantic.Index; |
| } |
| } |
| else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) { |
| uint i; |
| for (i = decl->Range.First; |
| i <= decl->Range.Last; i++) { |
| aactx->tempsUsed |= (1 << i); |
| } |
| } |
| |
| ctx->emit_declaration(ctx, decl); |
| } |
| |
| |
| /** |
| * Find the lowest zero bit in the given word, or -1 if bitfield is all ones. |
| */ |
| static int |
| free_bit(uint bitfield) |
| { |
| return ffs(~bitfield) - 1; |
| } |
| |
| |
| /** |
| * TGSI instruction transform callback. |
| * Replace writes to result.color w/ a temp reg. |
| * Upon END instruction, insert texture sampling code for antialiasing. |
| */ |
| static void |
| aa_transform_inst(struct tgsi_transform_context *ctx, |
| struct tgsi_full_instruction *inst) |
| { |
| struct aa_transform_context *aactx = (struct aa_transform_context *) ctx; |
| |
| if (aactx->firstInstruction) { |
| /* emit our new declarations before the first instruction */ |
| |
| struct tgsi_full_declaration decl; |
| uint i; |
| |
| /* find free sampler */ |
| aactx->freeSampler = free_bit(aactx->samplersUsed); |
| if (aactx->freeSampler >= PIPE_MAX_SAMPLERS) |
| aactx->freeSampler = PIPE_MAX_SAMPLERS - 1; |
| |
| /* find two free temp regs */ |
| for (i = 0; i < 32; i++) { |
| if ((aactx->tempsUsed & (1 << i)) == 0) { |
| /* found a free temp */ |
| if (aactx->colorTemp < 0) |
| aactx->colorTemp = i; |
| else if (aactx->texTemp < 0) |
| aactx->texTemp = i; |
| else |
| break; |
| } |
| } |
| assert(aactx->colorTemp >= 0); |
| assert(aactx->texTemp >= 0); |
| |
| /* declare new generic input/texcoord */ |
| decl = tgsi_default_full_declaration(); |
| decl.Declaration.File = TGSI_FILE_INPUT; |
| /* XXX this could be linear... */ |
| decl.Declaration.Interpolate = 1; |
| decl.Declaration.Semantic = 1; |
| decl.Semantic.Name = TGSI_SEMANTIC_GENERIC; |
| decl.Semantic.Index = aactx->maxGeneric + 1; |
| decl.Range.First = |
| decl.Range.Last = aactx->maxInput + 1; |
| decl.Interp.Interpolate = TGSI_INTERPOLATE_PERSPECTIVE; |
| ctx->emit_declaration(ctx, &decl); |
| |
| /* declare new sampler */ |
| decl = tgsi_default_full_declaration(); |
| decl.Declaration.File = TGSI_FILE_SAMPLER; |
| decl.Range.First = |
| decl.Range.Last = aactx->freeSampler; |
| ctx->emit_declaration(ctx, &decl); |
| |
| /* declare new temp regs */ |
| decl = tgsi_default_full_declaration(); |
| decl.Declaration.File = TGSI_FILE_TEMPORARY; |
| decl.Range.First = |
| decl.Range.Last = aactx->texTemp; |
| ctx->emit_declaration(ctx, &decl); |
| |
| decl = tgsi_default_full_declaration(); |
| decl.Declaration.File = TGSI_FILE_TEMPORARY; |
| decl.Range.First = |
| decl.Range.Last = aactx->colorTemp; |
| ctx->emit_declaration(ctx, &decl); |
| |
| aactx->firstInstruction = FALSE; |
| } |
| |
| if (inst->Instruction.Opcode == TGSI_OPCODE_END && |
| aactx->colorOutput != -1) { |
| struct tgsi_full_instruction newInst; |
| |
| /* TEX */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_TEX; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Dst[0].Register.Index = aactx->texTemp; |
| newInst.Instruction.NumSrcRegs = 2; |
| newInst.Instruction.Texture = TRUE; |
| newInst.Texture.Texture = TGSI_TEXTURE_2D; |
| newInst.Src[0].Register.File = TGSI_FILE_INPUT; |
| newInst.Src[0].Register.Index = aactx->maxInput + 1; |
| newInst.Src[1].Register.File = TGSI_FILE_SAMPLER; |
| newInst.Src[1].Register.Index = aactx->freeSampler; |
| |
| ctx->emit_instruction(ctx, &newInst); |
| |
| /* MOV rgb */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_MOV; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_OUTPUT; |
| newInst.Dst[0].Register.Index = aactx->colorOutput; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZ; |
| newInst.Instruction.NumSrcRegs = 1; |
| newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[0].Register.Index = aactx->colorTemp; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| /* MUL alpha */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_MUL; |
| newInst.Instruction.NumDstRegs = 1; |
| newInst.Dst[0].Register.File = TGSI_FILE_OUTPUT; |
| newInst.Dst[0].Register.Index = aactx->colorOutput; |
| newInst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_W; |
| newInst.Instruction.NumSrcRegs = 2; |
| newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[0].Register.Index = aactx->colorTemp; |
| newInst.Src[1].Register.File = TGSI_FILE_TEMPORARY; |
| newInst.Src[1].Register.Index = aactx->texTemp; |
| ctx->emit_instruction(ctx, &newInst); |
| |
| /* END */ |
| newInst = tgsi_default_full_instruction(); |
| newInst.Instruction.Opcode = TGSI_OPCODE_END; |
| newInst.Instruction.NumDstRegs = 0; |
| newInst.Instruction.NumSrcRegs = 0; |
| ctx->emit_instruction(ctx, &newInst); |
| } |
| else { |
| /* Not an END instruction. |
| * Look for writes to result.color and replace with colorTemp reg. |
| */ |
| uint i; |
| |
| for (i = 0; i < inst->Instruction.NumDstRegs; i++) { |
| struct tgsi_full_dst_register *dst = &inst->Dst[i]; |
| if (dst->Register.File == TGSI_FILE_OUTPUT && |
| dst->Register.Index == aactx->colorOutput) { |
| dst->Register.File = TGSI_FILE_TEMPORARY; |
| dst->Register.Index = aactx->colorTemp; |
| } |
| } |
| |
| ctx->emit_instruction(ctx, inst); |
| } |
| } |
| |
| |
| /** |
| * Generate the frag shader we'll use for drawing AA lines. |
| * This will be the user's shader plus some texture/modulate instructions. |
| */ |
| static boolean |
| generate_aaline_fs(struct aaline_stage *aaline) |
| { |
| struct pipe_context *pipe = aaline->stage.draw->pipe; |
| const struct pipe_shader_state *orig_fs = &aaline->fs->state; |
| struct pipe_shader_state aaline_fs; |
| struct aa_transform_context transform; |
| const uint newLen = tgsi_num_tokens(orig_fs->tokens) + NUM_NEW_TOKENS; |
| |
| aaline_fs = *orig_fs; /* copy to init */ |
| aaline_fs.tokens = tgsi_alloc_tokens(newLen); |
| if (aaline_fs.tokens == NULL) |
| return FALSE; |
| |
| memset(&transform, 0, sizeof(transform)); |
| transform.colorOutput = -1; |
| transform.maxInput = -1; |
| transform.maxGeneric = -1; |
| transform.colorTemp = -1; |
| transform.texTemp = -1; |
| transform.firstInstruction = TRUE; |
| transform.base.transform_instruction = aa_transform_inst; |
| transform.base.transform_declaration = aa_transform_decl; |
| |
| tgsi_transform_shader(orig_fs->tokens, |
| (struct tgsi_token *) aaline_fs.tokens, |
| newLen, &transform.base); |
| |
| #if 0 /* DEBUG */ |
| debug_printf("draw_aaline, orig shader:\n"); |
| tgsi_dump(orig_fs->tokens, 0); |
| debug_printf("draw_aaline, new shader:\n"); |
| tgsi_dump(aaline_fs.tokens, 0); |
| #endif |
| |
| aaline->fs->sampler_unit = transform.freeSampler; |
| |
| aaline->fs->aaline_fs = aaline->driver_create_fs_state(pipe, &aaline_fs); |
| if (aaline->fs->aaline_fs == NULL) |
| goto fail; |
| |
| aaline->fs->generic_attrib = transform.maxGeneric + 1; |
| FREE((void *)aaline_fs.tokens); |
| return TRUE; |
| |
| fail: |
| FREE((void *)aaline_fs.tokens); |
| return FALSE; |
| } |
| |
| |
| /** |
| * Create the texture map we'll use for antialiasing the lines. |
| */ |
| static boolean |
| aaline_create_texture(struct aaline_stage *aaline) |
| { |
| struct pipe_context *pipe = aaline->stage.draw->pipe; |
| struct pipe_screen *screen = pipe->screen; |
| struct pipe_resource texTemp; |
| struct pipe_sampler_view viewTempl; |
| uint level; |
| |
| memset(&texTemp, 0, sizeof(texTemp)); |
| texTemp.target = PIPE_TEXTURE_2D; |
| texTemp.format = PIPE_FORMAT_A8_UNORM; /* XXX verify supported by driver! */ |
| texTemp.last_level = MAX_TEXTURE_LEVEL; |
| texTemp.width0 = 1 << TEXTURE_SIZE_LOG2; |
| texTemp.height0 = 1 << TEXTURE_SIZE_LOG2; |
| texTemp.depth0 = 1; |
| texTemp.array_size = 1; |
| texTemp.bind = PIPE_BIND_SAMPLER_VIEW; |
| |
| aaline->texture = screen->resource_create(screen, &texTemp); |
| if (!aaline->texture) |
| return FALSE; |
| |
| u_sampler_view_default_template(&viewTempl, |
| aaline->texture, |
| aaline->texture->format); |
| aaline->sampler_view = pipe->create_sampler_view(pipe, |
| aaline->texture, |
| &viewTempl); |
| if (!aaline->sampler_view) { |
| return FALSE; |
| } |
| |
| /* Fill in mipmap images. |
| * Basically each level is solid opaque, except for the outermost |
| * texels which are zero. Special case the 1x1 and 2x2 levels |
| * (though, those levels shouldn't be used - see the max_lod setting). |
| */ |
| for (level = 0; level <= MAX_TEXTURE_LEVEL; level++) { |
| struct pipe_transfer *transfer; |
| struct pipe_box box; |
| const uint size = u_minify(aaline->texture->width0, level); |
| ubyte *data; |
| uint i, j; |
| |
| assert(aaline->texture->width0 == aaline->texture->height0); |
| |
| u_box_origin_2d( size, size, &box ); |
| |
| /* This texture is new, no need to flush. |
| */ |
| transfer = pipe->get_transfer(pipe, |
| aaline->texture, |
| level, |
| PIPE_TRANSFER_WRITE, |
| &box); |
| |
| data = pipe->transfer_map(pipe, transfer); |
| if (data == NULL) |
| return FALSE; |
| |
| for (i = 0; i < size; i++) { |
| for (j = 0; j < size; j++) { |
| ubyte d; |
| if (size == 1) { |
| d = 255; |
| } |
| else if (size == 2) { |
| d = 200; /* tuneable */ |
| } |
| else if (i == 0 || j == 0 || i == size - 1 || j == size - 1) { |
| d = 35; /* edge texel */ |
| } |
| else { |
| d = 255; |
| } |
| data[i * transfer->stride + j] = d; |
| } |
| } |
| |
| /* unmap */ |
| pipe->transfer_unmap(pipe, transfer); |
| pipe->transfer_destroy(pipe, transfer); |
| } |
| return TRUE; |
| } |
| |
| |
| /** |
| * Create the sampler CSO that'll be used for antialiasing. |
| * By using a mipmapped texture, we don't have to generate a different |
| * texture image for each line size. |
| */ |
| static boolean |
| aaline_create_sampler(struct aaline_stage *aaline) |
| { |
| struct pipe_sampler_state sampler; |
| struct pipe_context *pipe = aaline->stage.draw->pipe; |
| |
| memset(&sampler, 0, sizeof(sampler)); |
| sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE; |
| sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE; |
| sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE; |
| sampler.min_mip_filter = PIPE_TEX_MIPFILTER_LINEAR; |
| sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR; |
| sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR; |
| sampler.normalized_coords = 1; |
| sampler.min_lod = 0.0f; |
| sampler.max_lod = MAX_TEXTURE_LEVEL; |
| |
| aaline->sampler_cso = pipe->create_sampler_state(pipe, &sampler); |
| if (aaline->sampler_cso == NULL) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| |
| /** |
| * When we're about to draw our first AA line in a batch, this function is |
| * called to tell the driver to bind our modified fragment shader. |
| */ |
| static boolean |
| bind_aaline_fragment_shader(struct aaline_stage *aaline) |
| { |
| struct draw_context *draw = aaline->stage.draw; |
| struct pipe_context *pipe = draw->pipe; |
| |
| if (!aaline->fs->aaline_fs && |
| !generate_aaline_fs(aaline)) |
| return FALSE; |
| |
| draw->suspend_flushing = TRUE; |
| aaline->driver_bind_fs_state(pipe, aaline->fs->aaline_fs); |
| draw->suspend_flushing = FALSE; |
| |
| return TRUE; |
| } |
| |
| |
| |
| static INLINE struct aaline_stage * |
| aaline_stage( struct draw_stage *stage ) |
| { |
| return (struct aaline_stage *) stage; |
| } |
| |
| |
| /** |
| * Draw a wide line by drawing a quad, using geometry which will |
| * fullfill GL's antialiased line requirements. |
| */ |
| static void |
| aaline_line(struct draw_stage *stage, struct prim_header *header) |
| { |
| const struct aaline_stage *aaline = aaline_stage(stage); |
| const float half_width = aaline->half_line_width; |
| struct prim_header tri; |
| struct vertex_header *v[8]; |
| uint texPos = aaline->tex_slot; |
| uint posPos = aaline->pos_slot; |
| float *pos, *tex; |
| float dx = header->v[1]->data[posPos][0] - header->v[0]->data[posPos][0]; |
| float dy = header->v[1]->data[posPos][1] - header->v[0]->data[posPos][1]; |
| double a = atan2(dy, dx); |
| float c_a = (float) cos(a), s_a = (float) sin(a); |
| uint i; |
| |
| /* XXX the ends of lines aren't quite perfect yet, but probably passable */ |
| dx = 0.5F * half_width; |
| dy = half_width; |
| |
| /* allocate/dup new verts */ |
| for (i = 0; i < 8; i++) { |
| v[i] = dup_vert(stage, header->v[i/4], i); |
| } |
| |
| /* |
| * Quad strip for line from v0 to v1 (*=endpoints): |
| * |
| * 1 3 5 7 |
| * +---+---------------------+---+ |
| * | | |
| * | *v0 v1* | |
| * | | |
| * +---+---------------------+---+ |
| * 0 2 4 6 |
| */ |
| |
| /* new verts */ |
| pos = v[0]->data[posPos]; |
| pos[0] += (-dx * c_a - dy * s_a); |
| pos[1] += (-dx * s_a + dy * c_a); |
| |
| pos = v[1]->data[posPos]; |
| pos[0] += (-dx * c_a - -dy * s_a); |
| pos[1] += (-dx * s_a + -dy * c_a); |
| |
| pos = v[2]->data[posPos]; |
| pos[0] += ( dx * c_a - dy * s_a); |
| pos[1] += ( dx * s_a + dy * c_a); |
| |
| pos = v[3]->data[posPos]; |
| pos[0] += ( dx * c_a - -dy * s_a); |
| pos[1] += ( dx * s_a + -dy * c_a); |
| |
| pos = v[4]->data[posPos]; |
| pos[0] += (-dx * c_a - dy * s_a); |
| pos[1] += (-dx * s_a + dy * c_a); |
| |
| pos = v[5]->data[posPos]; |
| pos[0] += (-dx * c_a - -dy * s_a); |
| pos[1] += (-dx * s_a + -dy * c_a); |
| |
| pos = v[6]->data[posPos]; |
| pos[0] += ( dx * c_a - dy * s_a); |
| pos[1] += ( dx * s_a + dy * c_a); |
| |
| pos = v[7]->data[posPos]; |
| pos[0] += ( dx * c_a - -dy * s_a); |
| pos[1] += ( dx * s_a + -dy * c_a); |
| |
| /* new texcoords */ |
| tex = v[0]->data[texPos]; |
| ASSIGN_4V(tex, 0, 0, 0, 1); |
| |
| tex = v[1]->data[texPos]; |
| ASSIGN_4V(tex, 0, 1, 0, 1); |
| |
| tex = v[2]->data[texPos]; |
| ASSIGN_4V(tex, .5, 0, 0, 1); |
| |
| tex = v[3]->data[texPos]; |
| ASSIGN_4V(tex, .5, 1, 0, 1); |
| |
| tex = v[4]->data[texPos]; |
| ASSIGN_4V(tex, .5, 0, 0, 1); |
| |
| tex = v[5]->data[texPos]; |
| ASSIGN_4V(tex, .5, 1, 0, 1); |
| |
| tex = v[6]->data[texPos]; |
| ASSIGN_4V(tex, 1, 0, 0, 1); |
| |
| tex = v[7]->data[texPos]; |
| ASSIGN_4V(tex, 1, 1, 0, 1); |
| |
| /* emit 6 tris for the quad strip */ |
| tri.v[0] = v[2]; tri.v[1] = v[1]; tri.v[2] = v[0]; |
| stage->next->tri( stage->next, &tri ); |
| |
| tri.v[0] = v[3]; tri.v[1] = v[1]; tri.v[2] = v[2]; |
| stage->next->tri( stage->next, &tri ); |
| |
| tri.v[0] = v[4]; tri.v[1] = v[3]; tri.v[2] = v[2]; |
| stage->next->tri( stage->next, &tri ); |
| |
| tri.v[0] = v[5]; tri.v[1] = v[3]; tri.v[2] = v[4]; |
| stage->next->tri( stage->next, &tri ); |
| |
| tri.v[0] = v[6]; tri.v[1] = v[5]; tri.v[2] = v[4]; |
| stage->next->tri( stage->next, &tri ); |
| |
| tri.v[0] = v[7]; tri.v[1] = v[5]; tri.v[2] = v[6]; |
| stage->next->tri( stage->next, &tri ); |
| } |
| |
| |
| static void |
| aaline_first_line(struct draw_stage *stage, struct prim_header *header) |
| { |
| auto struct aaline_stage *aaline = aaline_stage(stage); |
| struct draw_context *draw = stage->draw; |
| struct pipe_context *pipe = draw->pipe; |
| const struct pipe_rasterizer_state *rast = draw->rasterizer; |
| uint num_samplers; |
| void *r; |
| |
| assert(draw->rasterizer->line_smooth); |
| |
| if (draw->rasterizer->line_width <= 2.2) |
| aaline->half_line_width = 1.1f; |
| else |
| aaline->half_line_width = 0.5f * draw->rasterizer->line_width; |
| |
| /* |
| * Bind (generate) our fragprog, sampler and texture |
| */ |
| if (!bind_aaline_fragment_shader(aaline)) { |
| stage->line = draw_pipe_passthrough_line; |
| stage->line(stage, header); |
| return; |
| } |
| |
| /* update vertex attrib info */ |
| aaline->pos_slot = draw_current_shader_position_output(draw);; |
| |
| /* allocate the extra post-transformed vertex attribute */ |
| aaline->tex_slot = draw_alloc_extra_vertex_attrib(draw, |
| TGSI_SEMANTIC_GENERIC, |
| aaline->fs->generic_attrib); |
| |
| /* how many samplers? */ |
| /* we'll use sampler/texture[pstip->sampler_unit] for the stipple */ |
| num_samplers = MAX2(aaline->num_sampler_views, aaline->num_samplers); |
| num_samplers = MAX2(num_samplers, aaline->fs->sampler_unit + 1); |
| |
| aaline->state.sampler[aaline->fs->sampler_unit] = aaline->sampler_cso; |
| pipe_sampler_view_reference(&aaline->state.sampler_views[aaline->fs->sampler_unit], |
| aaline->sampler_view); |
| |
| draw->suspend_flushing = TRUE; |
| aaline->driver_bind_sampler_states(pipe, num_samplers, aaline->state.sampler); |
| aaline->driver_set_sampler_views(pipe, num_samplers, aaline->state.sampler_views); |
| |
| /* Disable triangle culling, stippling, unfilled mode etc. */ |
| r = draw_get_rasterizer_no_cull(draw, rast->scissor, rast->flatshade); |
| pipe->bind_rasterizer_state(pipe, r); |
| |
| draw->suspend_flushing = FALSE; |
| |
| /* now really draw first line */ |
| stage->line = aaline_line; |
| stage->line(stage, header); |
| } |
| |
| |
| static void |
| aaline_flush(struct draw_stage *stage, unsigned flags) |
| { |
| struct draw_context *draw = stage->draw; |
| struct aaline_stage *aaline = aaline_stage(stage); |
| struct pipe_context *pipe = draw->pipe; |
| |
| stage->line = aaline_first_line; |
| stage->next->flush( stage->next, flags ); |
| |
| /* restore original frag shader, texture, sampler state */ |
| draw->suspend_flushing = TRUE; |
| aaline->driver_bind_fs_state(pipe, aaline->fs ? aaline->fs->driver_fs : NULL); |
| aaline->driver_bind_sampler_states(pipe, aaline->num_samplers, |
| aaline->state.sampler); |
| aaline->driver_set_sampler_views(pipe, |
| aaline->num_sampler_views, |
| aaline->state.sampler_views); |
| |
| /* restore original rasterizer state */ |
| if (draw->rast_handle) { |
| pipe->bind_rasterizer_state(pipe, draw->rast_handle); |
| } |
| |
| draw->suspend_flushing = FALSE; |
| |
| draw_remove_extra_vertex_attribs(draw); |
| } |
| |
| |
| static void |
| aaline_reset_stipple_counter(struct draw_stage *stage) |
| { |
| stage->next->reset_stipple_counter( stage->next ); |
| } |
| |
| |
| static void |
| aaline_destroy(struct draw_stage *stage) |
| { |
| struct aaline_stage *aaline = aaline_stage(stage); |
| struct pipe_context *pipe = stage->draw->pipe; |
| uint i; |
| |
| for (i = 0; i < PIPE_MAX_SAMPLERS; i++) { |
| pipe_sampler_view_reference(&aaline->state.sampler_views[i], NULL); |
| } |
| |
| if (aaline->sampler_cso) |
| pipe->delete_sampler_state(pipe, aaline->sampler_cso); |
| |
| if (aaline->texture) |
| pipe_resource_reference(&aaline->texture, NULL); |
| |
| if (aaline->sampler_view) { |
| pipe_sampler_view_reference(&aaline->sampler_view, NULL); |
| } |
| |
| draw_free_temp_verts( stage ); |
| |
| /* restore the old entry points */ |
| pipe->create_fs_state = aaline->driver_create_fs_state; |
| pipe->bind_fs_state = aaline->driver_bind_fs_state; |
| pipe->delete_fs_state = aaline->driver_delete_fs_state; |
| |
| pipe->bind_fragment_sampler_states = aaline->driver_bind_sampler_states; |
| pipe->set_fragment_sampler_views = aaline->driver_set_sampler_views; |
| |
| FREE( stage ); |
| } |
| |
| |
| static struct aaline_stage * |
| draw_aaline_stage(struct draw_context *draw) |
| { |
| struct aaline_stage *aaline = CALLOC_STRUCT(aaline_stage); |
| if (aaline == NULL) |
| return NULL; |
| |
| aaline->stage.draw = draw; |
| aaline->stage.name = "aaline"; |
| aaline->stage.next = NULL; |
| aaline->stage.point = draw_pipe_passthrough_point; |
| aaline->stage.line = aaline_first_line; |
| aaline->stage.tri = draw_pipe_passthrough_tri; |
| aaline->stage.flush = aaline_flush; |
| aaline->stage.reset_stipple_counter = aaline_reset_stipple_counter; |
| aaline->stage.destroy = aaline_destroy; |
| |
| if (!draw_alloc_temp_verts( &aaline->stage, 8 )) |
| goto fail; |
| |
| return aaline; |
| |
| fail: |
| if (aaline) |
| aaline->stage.destroy(&aaline->stage); |
| |
| return NULL; |
| } |
| |
| |
| static struct aaline_stage * |
| aaline_stage_from_pipe(struct pipe_context *pipe) |
| { |
| struct draw_context *draw = (struct draw_context *) pipe->draw; |
| return aaline_stage(draw->pipeline.aaline); |
| } |
| |
| |
| /** |
| * This function overrides the driver's create_fs_state() function and |
| * will typically be called by the state tracker. |
| */ |
| static void * |
| aaline_create_fs_state(struct pipe_context *pipe, |
| const struct pipe_shader_state *fs) |
| { |
| struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); |
| struct aaline_fragment_shader *aafs = CALLOC_STRUCT(aaline_fragment_shader); |
| |
| if (aafs == NULL) |
| return NULL; |
| |
| aafs->state.tokens = tgsi_dup_tokens(fs->tokens); |
| |
| /* pass-through */ |
| aafs->driver_fs = aaline->driver_create_fs_state(pipe, fs); |
| |
| return aafs; |
| } |
| |
| |
| static void |
| aaline_bind_fs_state(struct pipe_context *pipe, void *fs) |
| { |
| struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); |
| struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; |
| |
| /* save current */ |
| aaline->fs = aafs; |
| /* pass-through */ |
| aaline->driver_bind_fs_state(pipe, (aafs ? aafs->driver_fs : NULL)); |
| } |
| |
| |
| static void |
| aaline_delete_fs_state(struct pipe_context *pipe, void *fs) |
| { |
| struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); |
| struct aaline_fragment_shader *aafs = (struct aaline_fragment_shader *) fs; |
| |
| /* pass-through */ |
| aaline->driver_delete_fs_state(pipe, aafs->driver_fs); |
| |
| if (aafs->aaline_fs) |
| aaline->driver_delete_fs_state(pipe, aafs->aaline_fs); |
| |
| FREE((void*)aafs->state.tokens); |
| |
| FREE(aafs); |
| } |
| |
| |
| static void |
| aaline_bind_sampler_states(struct pipe_context *pipe, |
| unsigned num, void **sampler) |
| { |
| struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); |
| |
| /* save current */ |
| memcpy(aaline->state.sampler, sampler, num * sizeof(void *)); |
| aaline->num_samplers = num; |
| |
| /* pass-through */ |
| aaline->driver_bind_sampler_states(pipe, num, sampler); |
| } |
| |
| |
| static void |
| aaline_set_sampler_views(struct pipe_context *pipe, |
| unsigned num, |
| struct pipe_sampler_view **views) |
| { |
| struct aaline_stage *aaline = aaline_stage_from_pipe(pipe); |
| uint i; |
| |
| /* save current */ |
| for (i = 0; i < num; i++) { |
| pipe_sampler_view_reference(&aaline->state.sampler_views[i], views[i]); |
| } |
| for ( ; i < PIPE_MAX_SAMPLERS; i++) { |
| pipe_sampler_view_reference(&aaline->state.sampler_views[i], NULL); |
| } |
| aaline->num_sampler_views = num; |
| |
| /* pass-through */ |
| aaline->driver_set_sampler_views(pipe, num, views); |
| } |
| |
| |
| /** |
| * Called by drivers that want to install this AA line prim stage |
| * into the draw module's pipeline. This will not be used if the |
| * hardware has native support for AA lines. |
| */ |
| boolean |
| draw_install_aaline_stage(struct draw_context *draw, struct pipe_context *pipe) |
| { |
| struct aaline_stage *aaline; |
| |
| pipe->draw = (void *) draw; |
| |
| /* |
| * Create / install AA line drawing / prim stage |
| */ |
| aaline = draw_aaline_stage( draw ); |
| if (!aaline) |
| goto fail; |
| |
| /* create special texture, sampler state */ |
| if (!aaline_create_texture(aaline)) |
| goto fail; |
| |
| if (!aaline_create_sampler(aaline)) |
| goto fail; |
| |
| /* save original driver functions */ |
| aaline->driver_create_fs_state = pipe->create_fs_state; |
| aaline->driver_bind_fs_state = pipe->bind_fs_state; |
| aaline->driver_delete_fs_state = pipe->delete_fs_state; |
| |
| aaline->driver_bind_sampler_states = pipe->bind_fragment_sampler_states; |
| aaline->driver_set_sampler_views = pipe->set_fragment_sampler_views; |
| |
| /* override the driver's functions */ |
| pipe->create_fs_state = aaline_create_fs_state; |
| pipe->bind_fs_state = aaline_bind_fs_state; |
| pipe->delete_fs_state = aaline_delete_fs_state; |
| |
| pipe->bind_fragment_sampler_states = aaline_bind_sampler_states; |
| pipe->set_fragment_sampler_views = aaline_set_sampler_views; |
| |
| /* Install once everything is known to be OK: |
| */ |
| draw->pipeline.aaline = &aaline->stage; |
| |
| return TRUE; |
| |
| fail: |
| if (aaline) |
| aaline->stage.destroy( &aaline->stage ); |
| |
| return FALSE; |
| } |